Key Features
- SIRIUS soft starter: Soft starter with product designation Soft starter and SIRIUS brand name.
- 38 A rated current: Rated current at 40 °C: 38 A.
- 24 V AC/DC control supply: Control supply voltage type: AC/DC, with 24 V at 50 Hz, 60 Hz, and DC.
- S0 size with screw terminals: Size of engine control device: S0. Main current circuit and auxiliary and control circuit use screw-type terminals.
- Motor protection and control functions: Includes intrinsic device protection, motor overload protection, external reset, and adjustable current limitation.
Technical Summary
| Product designation | Soft starter |
|---|---|
| Product brand name | SIRIUS |
| Size | S0 |
| Rated current at 40 °C | 38 A |
| At 400 V | 18.5 kW |
| Operating voltage | 200 … 480 V |
| Control supply voltage | 24 V AC/DC |
| Operating frequency | 50 … 60 Hz |
| Front protection | IP20 |
Applications
- Motor soft starting: Soft starter for controlled starting of a motor circuit.
- Motor overload protection: Used for motor overload protection in the main current circuit.
- Current-limited starting: Used where adjustable current limitation is required during motor starting.
Frequently Asked Questions
What is Siemens 3RW4028-1BB04?
It is a SIRIUS soft starter in S0 size.
What are the rated current and power values for 3RW4028-1BB04?
Rated current at 40 °C is 38 A, and at 400 V it is 18.5 kW.
What control supply does 3RW4028-1BB04 use?
The control supply voltage is 24 V AC/DC.
What connection and mounting details are listed for 3RW4028-1BB04?
It uses screw-type terminals and screw and snap-on mounting.
